Extension fitting and cap therefor



y 1941- I 1, B. \NACKMAN 2,241,562

EXTENSION FITTING AND CAP THEREFOR Original Filed Jan. 2, 1932 Patented May 13, 1941 EXTENSION FITTING AND car THEREFOR Louis B. Waekman, St. Louis, Mo.,' assignor to American Flange & Manufacturing 00., Inc., Chicago, 111., a corporation of Illinois Application January 2, 1932, Serial No. 584,316

Renewed March 16, 1938 4 Claims. (01. 220-49) This invention relates to certain new and useful improvements in an extension fitting and a extended bushing or bung for the container with which both'the closure plug and the cap are cooperable, these being the primary objects of the invention.

Another object of the invention is to provide the head wal1 or barrel head of a container with an extending ring or neck which is threaded interiorly and is outwardly curled or turned at its upper, or extending end for providing an anchorage for an underclinched sealing cap.

Still another object of the invention is to provide a bushing of an improved construction for wholly receiving the closure plug and with means whereby a sealing cap can be secured to the bushing for concealing both the bushing and the pl s- A still further object of the invention is to provide an improved fitting in the form of a bushing for a metallic container for permitting a cooperable sealing cap to be clinched thereto in a covering or concealing condition and the cap being provided with means whereby the same can be easily and quickly removed and can be destroyed in its removal.

Other and further objects will appear in the specification and be specifically pointed out in the appended claims, reference being had to the accompanying drawing, exemplifying the invention, and in which:

Figures 1, 2 and 3 are vertical sectional views illustrative of forming the bushing or fitting before it is engaged in the barrel head. v

Figure 4 is a vertical sectional view through the bushing and a fragmentary portion of the barrel head showing the manner of mounting the bushing in the head before it is secured to the head.

Figure 5 is a vertical section taken through a portion of the. barrel head and the bushing when the bushing is in a closed and sealed condition.

Figure 6 is a plan view of Fig. 5.

With reference to the accompanying drawing and particularly to Figs. 1, 2 and 3; in the manu-' facture of this improved fitting, sections are cut from a metallic tubular length, each cut section then being in the form of a ring I, said ring after being severed then being counterbored at one end as designated at 2 for providing an annular tapering seat as shown at 3 in Fig. 1.

Obviously the counterbore 2 in the ring I provides a relatively thin annular wall 4, this wall as designated at 1 in the next operation on the ring I being outwardly turned and curled thereby providing an annular lip or head 5 as shown in Fig. 2. After the ring is made in the form shown in Fig.2, it is then provided with an inner beveled face 6 on the end opposite to the curled end of the ring. The ring is then interiorly threaded from the seat 3 to the beveled face 6 (Fig. 3). The ring is then ready for mounting in the barrel head.

In mounting the ring in the barrel head, attention is directed to Fig. 4.in which it will be seen that the barrel head 8 is provided with an annular raised portion 9 havinga depending annular flange I0 which is formed around the ring or bung opening of the barrel head. The bung opening is of a size so that the ring I can be,

snugly positioned therein in the manner shown in Fig. 4 and in this position, the beveled end of the ring is ready for securing by welding to the,

wall of the flange I0 of the raised portion 9, the welding joint between the beveled end of the ring and the wall of the flange II) of the barrel head being shown at II in Fig. 5. g

The formation of the annular raised portion 9 and the flange III therearoundobviously provides an annular reinforcement around the bung hole and the snugfitting of the ring in the bung hole and the securing of said ring by welding to the flange as shown in Fig. 5, obviously provides an extremely rigid and strongrfitting structure which willwithstand the repeated securing and unfastening of the closure plug-I2 in the ring I.

The closure plug I2 at its upper or outer end is provided with an annular groove I3 for the reception of a gasket I4, the gasket being retained by the plug and when the plug is threadingly engaged in the thread I of the ring I, the gasket I4 will be firmly seated in a packing manner on the seat 3 of the ring I, the plug being threadingly operated in the ring I by wrenching means engaged in the polygonal socket I5. The

flange or head I6 of the plug I2 being of the. approximate diameter of the threads of the plug permits the flange to be seated well within the counterbored part of the ring I.

After the plug I2 has been properly secured in the ring I in a seal tight manner, a sealing cap II having an extending annular skirt wall I8 and'a gasket I9 is then engaged over the lip 5 of the ring I and the inner end of the wall I8 is then clinched beneath or inwardly of the bead 5 in the "manner shown in Fig. 5, the sealing of the cap I1 over the ring I not only covering both the'top of the ringand the plug I2 for preventtions 20 extend, the outward eter of the threads, a. gasket and deformed between ing unauthorized access outer seal to the ring for preventing leakage from the container in the event that the plug 12 became loosened as the cap I! is clinched over the head 5 of the ring I by an operating tool which will firmly seat the gasket IQ of the cap on top of the bead 5 of the ring.

After shipment of a container having this improved fitting thereon andthe sealing cap I! and it is desired to remove the cap for removal of the closure plug 12, one of the projections 20 of the cap of which there are a pair as shown extendingfrom the annular wall l8 of the cap, is gripped and outwardly pulled and as the cap is. provided with a pair of spaced weakened or scored lines 2|, from; between which the projecpulling on a projection will sever or partially sever the cap on the weakened lines 2 I. cap in this manner will not only provide for easy removal of the severed halves of the cap but in addition will destroy the cap against re-use.

Obviously constructional modifications of the device are possible without departing from the spirit of the present invention and therefore it is to be understood that it is not necessary to limit the invention by the terms used in the foregoing description, excepting such as the state of the art may require.

, What I claim is:

1. In a structure of the class described, an extending metallic tubular bushing providing an opening in a wall of the container, the lower or inner part of which opening is threaded and the outer part of which opening is provided with an annular bead and an unthreaded seat tapering downwardly and inwardly from the outer edge of said opening to the top of its "threaded part, a plug having a threaded body with the outer end of the plug of the approximate diamcarried by said plug between its outer end and the threads thereof and having a diameter larger than the plug and adapted to be-deformed against said seat, and leak-proof and tamper-proof sealing means including a cap having its cylindrical skirt contracted around said bead, and a gasket confined said bead and the top of the cap and the cap skirt.

2. In a structure of the class described, an extending metallic tubular bushing providing The severing of the 2,241,562 but also forming an an opening in a wall'of the container, the lower or inner part of which opening is threaded and the outer part of which opening is provided with an unthreaded seat tapering downwardly and inwardly from the outer edge of said opening to the top of its threaded part, a closure plug having a threadedbody part adapted to engage said threaded opening and having a head of the approximate diameter of the threads thereof, and a readily deformable gasket carried by said plug between its head and threaded body part and adapted to be deformed against said seat between said seatand plug head and above the threads of said opening.

3. In combination, a'container wall having an opening therein and a bushing member received in said opening, the stock of said container wall surrounding said opening being bent out of the plane of said wall and being provided with a return bend forming an inwardly directed flange defining said opening, said flange and said bushing member being unitarily joined by welding at the free ends thereof and portions of said bushing member and saidflange lying side by side surrounding said opening being bent out of the and being provided with a a flange defining said opening, said flange and said bushing member being integrally joined at the inner free ends thereof and portions of said .bushing member and said flange extending from said Joint lying in opposed return bend forming flange locking against each other to protect the its upper end.

LOUIS B. WACKMAN. 3 

